SET @start_global_value = @@global.aria_group_commit_interval; select @@global.aria_group_commit_interval; @@global.aria_group_commit_interval 0 select @@session.aria_group_commit_interval; ERROR HY000: Variable 'aria_group_commit_interval' is a GLOBAL variable show global variables like 'aria_group_commit_interval'; Variable_name Value aria_group_commit_interval 0 show session variables like 'aria_group_commit_interval'; Variable_name Value aria_group_commit_interval 0 select * from information_schema.global_variables where variable_name='aria_group_commit_interval'; VARIABLE_NAME VARIABLE_VALUE ARIA_GROUP_COMMIT_INTERVAL 0 select * from information_schema.session_variables where variable_name='aria_group_commit_interval'; VARIABLE_NAME VARIABLE_VALUE ARIA_GROUP_COMMIT_INTERVAL 0 set global aria_group_commit_interval=1; select @@global.aria_group_commit_interval; @@global.aria_group_commit_interval 1 set session aria_group_commit_interval=1; ERROR HY000: Variable 'aria_group_commit_interval' is a GLOBAL variable and should be set with SET GLOBAL set global aria_group_commit_interval=1.1; ERROR 42000: Incorrect argument type to variable 'aria_group_commit_interval' set global aria_group_commit_interval=1e1; ERROR 42000: Incorrect argument type to variable 'aria_group_commit_interval' set global aria_group_commit_interval="foo"; ERROR 42000: Incorrect argument type to variable 'aria_group_commit_interval' set global aria_group_commit_interval=0; select @@global.aria_group_commit_interval; @@global.aria_group_commit_interval 0 set global aria_group_commit_interval=cast(-1 as unsigned int); Warnings: Note 1105 Cast to unsigned converted negative integer to it's positive complement Note 1105 Cast to unsigned converted negative integer to it's positive complement Warning 1292 Truncated incorrect aria_group_commit_interval value: '18446744073709551615' select @@global.aria_group_commit_interval; @@global.aria_group_commit_interval 4294967295 SET @@global.aria_group_commit_interval = @start_global_value;